Transparent uniplanar antenna

Abstract

The disclosed antenna device may include a substrate and a uniplanar transparent conductive material on the substrate. The uniplanar transparent conductive material may include an active segment, a capacitive active segment to capacitively feed the active segment and separated from the active segment by a dummy segment, and a tuning active segment configured with dimensions to create a substantially 90-degree phase difference between electric field components of two edges the active segment when the antenna device resonates at a desired frequency. Various other methods, systems, and computer-readable media are also disclosed.

What is claimed is: 
     
         1 . A device comprising:
 an antenna comprising:   a substrate, and a uniplanar transparent conductive material on the substrate comprising:
 an active segment; 
 a dummy segment; and 
 a capacitive active segment to capacitively feed the active segment, wherein the capacitive active segment is separated from the active segment by the dummy segment and is coupled to a coplanar waveguide (CPW) feed. 
   
     
     
         2 . The device of  claim 1 , wherein the active segment comprises a first edge connected to a second edge, and a first surface current of the first edge is substantially perpendicular to a second surface current of the second edge. 
     
     
         3 . The device of  claim 2 , further comprising a tuning active segment configured with dimensions to create a substantially 90-degree phase difference between the first surface current and the second surface current when the antenna resonates at a desired frequency. 
     
     
         4 . The device of  claim 3 , further wherein the capacitive active segment is located proximate to a tuning active segment within the antenna. 
     
     
         5 . The device of  claim 4 , wherein the dummy segment comprises a metal mesh material having one or more cells forming an open-circuit structure. 
     
     
         6 . The device of  claim 4 , wherein the capacitive active segment is located on a same side as the tuning active segment with respect to the antenna. 
     
     
         7 . The device of  claim 1 , wherein the uniplanar transparent conductive material comprises a metal mesh material. 
     
     
         8 . The device of  claim 7 , wherein the active segment corresponds to a perimeter of the antenna that at least partially surrounds the dummy segment. 
     
     
         9 . The device of  claim 8 , wherein the active segment at least partially surrounds at least one other active segment. 
     
     
         10 . The device of  claim 9 , wherein a density of the metal mesh material for the active segment is denser than a density of the metal mesh material for the at least one other active segment. 
     
     
         11 . The device of  claim 7 , wherein the active segment corresponds to a closed- circuit structure of the metal mesh material and the dummy segment corresponds to an open circuit structure of the metal mesh material. 
     
     
         12 . The device of  claim 7 , wherein the dummy segment comprises the metal mesh material having cut cells. 
     
     
         13 . A system comprising:
 at least one physical processor;   physical memory comprising computer-executable instructions; and   an antenna comprising:
 a substrate; and 
 a uniplanar transparent conductive material on the substrate comprising:
 an active segment; 
 a dummy segment; and 
 a capacitive active segment to capacitively feed the active segment, wherein the capacitive active segment is coupled to a coplanar waveguide (CPW) feed and is separated from the active segment by the dummy segment. 
 
   
     
     
         14 . The system of  claim 13 , wherein the antenna further comprises:
 a tuning active segment configured with dimensions to create a substantially 90-degree phase difference between a first surface current of a first edge of the active segment and a second surface current of a second edge of the active segment, when the antenna resonates at a desired frequency.   
     
     
         15 . The system of  claim 14 , wherein:
 the active segment corresponds to a perimeter of the antenna that at least partially surrounds the dummy segment, the capacitive active segment, and the tuning active segment;   the capacitive active segment is separated from the active segment and the tuning active segment by the dummy segment;   the active segment comprises the first edge connected to the second edge; and   the first surface current of the first edge is substantially perpendicular to the second surface current of the second edge.   
     
     
         16 . The system of  claim 15 , wherein the capacitive active segment is located on a same side as the tuning active segment within the perimeter of the antenna. 
     
     
         17 . The system of  claim 14 , wherein:
 the uniplanar transparent conductive material comprises a metal mesh material; and   a density of the metal mesh material for the active segment is denser than a density of the metal mesh material for the tuning active segment and the capacitive active segment.   
     
     
         18 . The system of  claim 17 , wherein the active segment corresponds to a closed-circuit structure of the metal mesh material and the dummy segment corresponds to an open circuit structure of the metal mesh material. 
     
     
         19 . A method comprising:
 receiving a signal by a capacitive active segment of an antenna from a waveguide device; and   capacitively feeding a perimeter active segment of the antenna based on the received signal;   wherein the capacitive active segment is conductively separated from the perimeter active segment by a dummy segment, the capacitive segment to capacitively feed the active segment, wherein the capacitive active segment is coupled to a coplanar waveguide (CPW) feed, and   wherein the antenna comprises a uniplanar transparent conductive material on a substrate.   
     
     
         20 . The method of  claim 19 , further comprising generating a substantially 90-degree phase difference between a first electric field component of a first edge of the perimeter active segment and a second electric field component of a second edge of the perimeter active segment using a tuning active segment coupled to the first and second edges when the antenna resonates at a desired frequency.